If V2's AI stack was smaller than V1 - I'd be inclined to call. But it's not.
And I guarantee V1 is not folding.
Nobody calls a raise oop, checks the flop and then repops a turn bet with intentions of folding. He's very strong.
I'm guessing we can put V3's range on a big Ace since he folded.
And at least one of the two Vs on a FD.
Which leaves us with the question: what's the other V got?
My guess is it's at least 2 pair. Since we got two 8 blockers... 98 is more improbable. So I think a set is reasonable as is 76os.
In 4-way action, my experience is that somebody always has the nut straight... call it Hiro's Theorem.
I think a fold is in order. We're probably a 3:1 dog and we're not getting the right price to continue.